<template>
  <div class="my-tab-bar">
    <div class="tab-item" :class="{active:localIndex === i}" @click="changeColor(i,item.tabName)" v-for="(item,i) in tabBarList" :key="item.name">
      <!-- 图标 -->
      <span class="iconfont" :class="item.icon"></span>
      <!-- 文字 -->
      <span>{{ item.name }}</span>
    </div>
  </div>
</template>

<script>
export default {
  props: {
    tabBarList: {
      type: Array,
      default: () => [],
      validator (val) {
        if (val.length >= 2 && val.length <= 5) {
          return true
        } else {
          return false
        }
      }
    }
  },
  data () {
    return {
      localIndex: 0
    }
  },
  methods: {
    changeColor (index, tabName) {
      this.localIndex = index
      this.$emit('change_tab', tabName)
    }
  }
}
</script>

<style lang="less" scoped>
.my-tab-bar {
  position: fixed;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 50px;
  border-top: 1px solid #ccc;
  display: flex;
  justify-content: space-around;
  align-items: center;
  background-color: white;
  .tab-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    &.active {
      color: blue;
    }
  }
}
</style>
